1.

The forward resistance for a PIN diode is given by ________(a) RF = W/σP(b) RF = W/σN(c) RF = WσP(d) RF = WσNI had been asked this question in exam.My doubt stems from p-i-n Diode and its Characteristics topic in portion Semiconductor-Diode Characteristics of Electronic Devices & Circuits

Answer»

The correct option is (b) RF = W/σN

For EXPLANATION: Forward resistance for a PIN diode depends on the width, current density and positive carrier CONCENTRATION of the diode. No diode is perfectly ideal. In practise, a diode OFFERS a small resistance in forward bias which is CALLED as forward resistance.



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